Alitalia airlines know everything about the necessary changes that can be made by the pessengers. Pessengers will have to pay Alitalia Change Ticket Fee for making modifications in the flight bookings. you can avoid this fee by making alterations in the given time slot but after this time pessengers have to pay the applicable charges for making modifications.

https://airlinespolicy.com/flight-change-policy/alitalia-change-booking/​